a. Of or relating to radio waves with a wavelength less than 10 meters (33 feet).
b. Of or relating to optical pulses with typical durations of femtoseconds.
2. Of extremely short duration: an ultrashort flash.
3. Extremely short: an ultrashort skirt.
4. Of or relating to fixed-income investments with extremely short maturities, usually less than one year.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Telecommunications) (of a radio wave) having a wavelength shorter than 10 metres
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌʌl trəˈʃɔrt)

1. extremely short, esp. in duration.
2. (of a wavelength) smaller than 10 meters.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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Brian Kelly wants to buy ProShares UltraShort 20+ Year Treasury (NYSE:TBT).
ProShares reported on Thursday that it will close and liquidate the exchange traded funds (ETFs) CDS Short North American HY Credit ETF (Cboe:WYDE) (BZX Exchange Inc:WYDE), UltraShort Gold Miners (NYSE Arca:GDXS) and Ultra Gold Miners (NYSE:ArcaGDXX), based on an ongoing review of ProShares product offerings and client feedback.
Among the updates is the promise of PDT delivered by means of an ultrashort incubation time of 10-20 minutes, followed by prolonged blue light exposure time of 1 hour.
This new species is unique in this genus by the combinations of having 5 pairs of long setae on pronotum, the ultrashort chapped craspedum on posterior margin of abdominal tergites, and the shape and relative locations of setae on tergite IX.
Latest data shows the largest indicative borrow rate increases among liquid option names include: Comerica (CMA) 3.09% +2.84, ProShares UltraShort Lehman 20 plus Year Treasury (TBT) 4.67% +0.67, Turtle Beach (HEAR) 40.28% +0.12, iShares Nasdaq Biotechnology Index Fund (IBB) 1.53% +0.10, ProShares Short S&P 500 (SH) 1.02% +0.06, Direxion Daily Small Cap Bear 3X Shares (TZA) 5.91% +0.03, ProShares UltraPro Short QQQ (SQQQ) 1.50% +0.03, Dillard's (DDS) 1.45% +0.02, Market Vectors Russia (RSX) 0.30% +0.02, and ProShares UltraPro Dow 30 (UDOW) 5.90% +0.02.
Arthur Ashkin, Donna Strickland and Gerard Mourou won the 2018 prize for two contributions to laser science, Ashkin for his work on optical tweezers, and Mourou and Strickland for the invention of chirped pulse amplification, a technique to amplify an ultrashort laser pulse up to petawatt levels.
For example, the lasers used at INRS produce ultrashort pulses in the femtosecond range (10-15 s) that are far too short to visualize.
It said that using current imaging techniques, measurements taken with ultrashort laser pulses must be repeated many times, "which is appropriate for some types of inert samples, but impossible for other more fragile ones."
The incisions are made through microscopic-photodisruptions of tissue, created by ultrashort pulses.
These ultrashort, ultradense data packets result in longer battery life and enable support for multiple types of smart-home sensors in a single device.